90193001 has 2 divisors, whose sum is σ = 90193002. Its totient is φ = 90193000.

The previous prime is 90192997. The next prime is 90193003. The reversal of 90193001 is 10039109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46566976 + 43626025 = 6824^2 + 6605^2 .

It is a cyclic number.

It is not a de Polignac number, because 90193001 - 2² = 90192997 is a prime.

Together with 90193003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90193003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45096500 + 45096501.

It is an arithmetic number, because the mean of its divisors is an integer number (45096501).

Almost surely, 2^90193001 is an apocalyptic number.

It is an amenable number.

90193001 is a deficient number, since it is larger than the sum of its proper divisors (1).

90193001 is an equidigital number, since it uses as much as digits as its factorization.

90193001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 90193001 is about 9496.9995788144. Note that the first 3 decimals coincide. The cubic root of 90193001 is about 448.4605850540.

The spelling of 90193001 in words is "ninety million, one hundred ninety-three thousand, one".